ADS optimization based on equation

is it possible to optimize something in ads upon an equation?
I need an sloped characteristic for S21 in a defined frequency range, how can I optimize circuit parameters to yield the goal?

Describe your needs in detail.

pancho_hideboo
as described I want to have a roll up (to compensate the roll off in a broad band width), for this I am going to optimize a broadband hybrid ( constructed from edge coupled strip lines) but have no idea about the optimization method.
dose ADS accept an equation in its optimization as goal for example |S21- a sloped line|<.1dB?
how can I do that?

What do you mean ?

Again describe correctly.

Basically you can use "Measurement Expressions" as Goal for Optimizer.
You can use expressions including "freq" which is simulator's reserved variable.
See documents of ADS. Also you can use conditional statements such as "if then else endif".

You can use math function with expression:
use max() for S21 dB maximum;
use min() for S21 dB minimum;
delta1=max()-min()
then use delta1 as goal to say 0.5dB